/Engine/Source/Developer/MeshMergeUtilities/Public/MeshMergeDataTracker.h
Retrieves the MeshLOD keys from which the original sections are mapped to the unique section index
void GetMeshLODsMappedToUniqueSection ( int32 UniqueIndex, [TArray](API\Runtime\Core\Containers\TArray)< [FMeshLODKey](API\Developer\MeshMergeUtilities\FMeshLODKey) > & InOutMeshLODs )